664005036 has 12 divisors (see below), whose sum is σ = 1549345112. Its totient is φ = 221335008.

The previous prime is 664005019. The next prime is 664005037. The reversal of 664005036 is 630500466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×664005036² = 881805375666722592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664004994 and 664005012.

It is not an unprimeable number, because it can be changed into a prime (664005037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27666865 + ... + 27666888.

Almost surely, 2^664005036 is an apocalyptic number.

It is an amenable number.

664005036 is an abundant number, since it is smaller than the sum of its proper divisors (885340076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664005036 is a wasteful number, since it uses less digits than its factorization.

664005036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55333760 (or 55333758 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 664005036 is about 25768.2951706162. The cubic root of 664005036 is about 872.4163398464.

The spelling of 664005036 in words is "six hundred sixty-four million, five thousand, thirty-six".